Burget Clinic uses client-visits as its measure of activity. During July, the clinic budgeted for 2,100 client-visits, but its actual level of activity was 2,110 client-visits. The clinic has provided the following data concerning the formulas used in its budgeting and its actual results for July:

Data used in budgeting:

Fixed element per month Variable element per client-visit
Revenue - $47.10
Personnel expenses $22,700 $16.90
Medical supplies 1,600 6.50
Occupancy expenses 6,900 1.50
Administrative expenses 3,400 0.40
Total expenses $34,600 $25.30

Actual results for July:

Revenue $101,491
Personnel expenses 55,699
Medical supplies 15,895
Occupancy expenses 9,785
Administrative expenses 4,424

The revenue variance for July would be closest to: __________

a. $2,581 F
b. $2,110 U
c. $2,110 F
d. $2,581 U